<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      div {
        background-color: #000;
        width: 100%;
        height: 100vh;
      }
      .span {
        color: white;
        mix-blend-mode: overlay;
      }
    </style>
  </head>
  <body>
    <div class="div">
      <span class="span">11111111111</span>
    </div>
  </body>
</html>
